Release v1.6.5

17cef2d Add ascii Logo
acd027b add version command.
4b10396 Suppo zero value to clear the badge on the app icon.
711a25e update testing to 1.7.4 and 1.6.4
d8835c0 Support docker build for production.
2c1c98e add deploy docker image task
77fb11d add vet and lint.
5f79283 fix golint error.
a8574af remove docker from travis
e690f81 add codecov on drone.
1f2da28 fixed #147 support zero value of badge.
a53fa68 Support github release.
8f22a48 remove unused target on Makefile.
57a7c18 remove docker folder.